diff --git a/test/case/infix_firewall/basic/test.adoc b/test/case/infix_firewall/basic/test.adoc
index bf6aef8b..015e9a4c 100644
--- a/test/case/infix_firewall/basic/test.adoc
+++ b/test/case/infix_firewall/basic/test.adoc
@@ -11,7 +11,7 @@ image::basic.svg[align=center, scaledwidth=50%]
 - Single zone configuration, "public", with action=drop
 - Allowed services: SSH (port 22), DHCPv6-client, mySSH (custom, port 222)
 - All other ports (HTTP, HTTPS, Telnet, etc.) blocked
-- Verifies unused interfaces automatically assigned to default zone
+- Check that unused interfaces are automatically assigned to default zone
 
 ==== Topology
 
@@ -26,6 +26,7 @@ image::topology.svg[Basic Firewall for End Devices topology, align=center, scale
 . Verify ICMPv6 is dropped
 . Verify SSH service is allowed
 . Verify custom mySSH service is allowed
+. Verify HTTP service override (8080 allowed, 80 blocked)
 . Verify other ports are blocked
 
 
diff --git a/test/case/infix_firewall/basic/topology.dot b/test/case/infix_firewall/basic/topology.dot
index c75e3bbf..52174355 100644
--- a/test/case/infix_firewall/basic/topology.dot
+++ b/test/case/infix_firewall/basic/topology.dot
@@ -1,26 +1,26 @@
 graph "1x3" {
     layout  = "neato";
     overlap = false;
-    esep    = "+80";
+    esep    = "+30";
 
     node [shape=record, fontname="DejaVu Sans Mono, Book"];
     edge [color="cornflowerblue", penwidth="2", fontname="DejaVu Serif, Book"];
 
     host [
 	  label="host | { <mgmt> mgmt | <data> data }",
-	  pos="1,1!",
+	  pos="10,10.95!",
 	  requires="controller"
     ];
 
     target [
 	    label="{ <mgmt> mgmt | <data> data | <unused> unused } | target",
-	    pos="3,1!",
+	    pos="30,10!",
 	    requires="infix",
     ];
 
     dummy [
 	    label="{ <link> link } | dummy",
-	    pos="5,1!",
+	    pos="29.8,00!",
 	    requires="infix",
     ];
 
diff --git a/test/case/infix_firewall/basic/topology.svg b/test/case/infix_firewall/basic/topology.svg
index 644d700d..22a6325f 100644
--- a/test/case/infix_firewall/basic/topology.svg
+++ b/test/case/infix_firewall/basic/topology.svg
@@ -1,45 +1,59 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
  "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
-
+<!-- Generated by graphviz version 2.43.0 (0)
+ -->
 <!-- Title: 1x3 Pages: 1 -->
-<svg width="440pt" height="78pt"
- viewBox="0.00 0.00 440.03 78.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 74)">
+<svg width="381pt" height="191pt"
+ viewBox="0.00 0.00 381.03 190.72" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 186.72)">
 <title>1x3</title>
-<polygon fill="white" stroke="transparent" points="-4,4 -4,-74 436.03,-74 436.03,4 -4,4"/>
+<polygon fill="white" stroke="transparent" points="-4,4 -4,-186.72 377.03,-186.72 377.03,4 -4,4"/>
 <!-- host -->
 <g id="node1" class="node">
 <title>host</title>
-<polygon fill="none" stroke="black" points="0,-12 0,-58 100,-58 100,-12 0,-12"/>
-<text text-anchor="middle" x="25" y="-31.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">host</text>
-<polyline fill="none" stroke="black" points="50,-12 50,-58 "/>
-<text text-anchor="middle" x="75" y="-42.8" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt</text>
-<polyline fill="none" stroke="black" points="50,-35 100,-35 "/>
-<text text-anchor="middle" x="75" y="-19.8" font-family="DejaVu Sans Mono, Book" font-size="14.00">data</text>
+<polygon fill="none" stroke="black" points="0,-136.22 0,-182.22 100,-182.22 100,-136.22 0,-136.22"/>
+<text text-anchor="middle" x="25" y="-155.52" font-family="DejaVu Sans Mono, Book" font-size="14.00">host</text>
+<polyline fill="none" stroke="black" points="50,-136.22 50,-182.22 "/>
+<text text-anchor="middle" x="75" y="-167.02" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt</text>
+<polyline fill="none" stroke="black" points="50,-159.22 100,-159.22 "/>
+<text text-anchor="middle" x="75" y="-144.02" font-family="DejaVu Sans Mono, Book" font-size="14.00">data</text>
 </g>
 <!-- target -->
 <g id="node2" class="node">
 <title>target</title>
-<polygon fill="none" stroke="black" points="300.03,-0.5 300.03,-69.5 432.03,-69.5 432.03,-0.5 300.03,-0.5"/>
-<text text-anchor="middle" x="333.03" y="-54.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt</text>
-<polyline fill="none" stroke="black" points="300.03,-46.5 366.03,-46.5 "/>
-<text text-anchor="middle" x="333.03" y="-31.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">data</text>
-<polyline fill="none" stroke="black" points="300.03,-23.5 366.03,-23.5 "/>
-<text text-anchor="middle" x="333.03" y="-8.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">unused</text>
-<polyline fill="none" stroke="black" points="366.03,-0.5 366.03,-69.5 "/>
-<text text-anchor="middle" x="399.03" y="-31.3" font-family="DejaVu Sans Mono, Book" font-size="14.00">target</text>
+<polygon fill="none" stroke="black" points="241.03,-112.51 241.03,-181.51 373.03,-181.51 373.03,-112.51 241.03,-112.51"/>
+<text text-anchor="middle" x="274.03" y="-166.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">mgmt</text>
+<polyline fill="none" stroke="black" points="241.03,-158.51 307.03,-158.51 "/>
+<text text-anchor="middle" x="274.03" y="-143.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">data</text>
+<polyline fill="none" stroke="black" points="241.03,-135.51 307.03,-135.51 "/>
+<text text-anchor="middle" x="274.03" y="-120.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">unused</text>
+<polyline fill="none" stroke="black" points="307.03,-112.51 307.03,-181.51 "/>
+<text text-anchor="middle" x="340.03" y="-143.31" font-family="DejaVu Sans Mono, Book" font-size="14.00">target</text>
 </g>
 <!-- host&#45;&#45;target -->
 <g id="edge1" class="edge">
 <title>host:mgmt&#45;&#45;target:mgmt</title>
-<path fill="none" stroke="lightgray" stroke-width="2" d="M100,-47C100,-47 300.03,-58 300.03,-58"/>
+<path fill="none" stroke="lightgray" stroke-width="2" d="M100,-171.22C100,-171.22 241.03,-170.01 241.03,-170.01"/>
 </g>
 <!-- host&#45;&#45;target -->
 <g id="edge2" class="edge">
 <title>host:data&#45;&#45;target:data</title>
-<path fill="none" stroke="black" stroke-width="2" d="M100,-23C100,-23 300.03,-35 300.03,-35"/>
-<text text-anchor="middle" x="159" y="-26.8" font-family="DejaVu Serif, Book" font-size="14.00">192.168.1.42/24</text>
+<path fill="none" stroke="black" stroke-width="2" d="M100,-147.22C100,-147.22 241.03,-147.01 241.03,-147.01"/>
+<text text-anchor="middle" x="159" y="-151.02" font-family="DejaVu Serif, Book" font-size="14.00">192.168.1.42/24</text>
+</g>
+<!-- dummy -->
+<g id="node3" class="node">
+<title>dummy</title>
+<polygon fill="none" stroke="black" points="250.46,-0.5 250.46,-36.5 358.46,-36.5 358.46,-0.5 250.46,-0.5"/>
+<text text-anchor="middle" x="275.46" y="-14.8" font-family="DejaVu Sans Mono, Book" font-size="14.00">link</text>
+<polyline fill="none" stroke="black" points="300.46,-0.5 300.46,-36.5 "/>
+<text text-anchor="middle" x="329.46" y="-14.8" font-family="DejaVu Sans Mono, Book" font-size="14.00">dummy</text>
+</g>
+<!-- target&#45;&#45;dummy -->
+<g id="edge3" class="edge">
+<title>target:unused&#45;&#45;dummy:link</title>
+<path fill="none" stroke="gray" stroke-width="2" stroke-dasharray="5,2" d="M274.03,-112.01C274.03,-112.01 275.46,-36.5 275.46,-36.5"/>
 </g>
 </g>
 </svg>